公开(公告)号：US20200077088A1

公开(公告)日：2020-03-05

申请号：US16677132

申请日：2019-11-07

Applicant: Mediatek Inc.

Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yu-Chen Sun ,  Yi-Ting Shen

IPC: H04N19/105 ,  H04N19/52 ,  H04N19/176 ,  H04N19/567 ,  H04N19/57

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

公开(公告)号：US20190320203A1

公开(公告)日：2019-10-17

申请号：US16382167

申请日：2019-04-11

Applicant: MediaTek Inc.

Inventor： Man-Shu Chiang ,  Chun-Chia Chen ,  Chih-Wei Hsu

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/132 ,  H04N19/196 ,  H04N19/46 ,  H04N19/513 ,  H04N19/52

Abstract: A video coder that implicitly signals a transform setting for coding a block of pixels is provided. The video coder derives a transform setting for a block of pixels based on a block processing setting. The video coder processes the block of pixels according to the block processing setting. For encoding, the video coder transforms a set of residual pixels to generate a set of transform coefficients according to the transform setting. For decoding, the video coder inverse transforms the transform coefficients to generate a set of residual pixels according to the transform setting.

公开(公告)号：US10440375B2

公开(公告)日：2019-10-08

申请号：US15919008

申请日：2018-03-12

Applicant: MediaTek Inc.

Inventor： Tzu-Der Chuang ,  Zhenzhong Chen ,  Shan Liu ,  Ching-Yeh Chen ,  Chih-Wei Hsu

IPC: H04N19/30 ,  H04N19/52 ,  H04N19/12 ,  H04N19/187 ,  H04N19/50 ,  H04N19/61 ,  H04N19/105 ,  H04N19/176 ,  H04N19/134

Abstract: Methods of adaptive transform type based on transform unit (TU) size for enhancement layer (EL) coding and multiple motion candidates for EL coding based on corresponding base layer (BL) video data are provided. One method selects a transform type from multiple allowable transform types based on the TU size and applies the selected transform type to the transform units of the inter-layer prediction processed data. Another method derives multiple motion candidates for the EL video data coded in Merge mode or Inter mode based on motion information associated with the corresponding BL video data.

公开(公告)号：US20190238890A1

公开(公告)日：2019-08-01

申请号：US16216650

申请日：2018-12-11

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/86 ,  H04N19/80 ,  H04N19/117 ,  H04N19/137 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/80

Abstract: A deblocking filtering method includes receiving reconstructed video data associated with a block boundary in a video coding system. The block boundary has N lines of samples crossing the block boundary from a P side to a Q side of the boundary. The method further includes determining whether to apply a first filter set to reduce block artifacts at the block boundary based on whether a first inter-side difference of a first line of the N lines of samples is greater than an inter-side difference threshold, determining a filter length of a filter in the first filter set based on a first side length of the P side, and a second side length of the Q side when it is determined to apply the first filter set, and applying at least one filter in the first filter set with the determined filter length on the block boundary.

公开(公告)号：US20180352223A1

公开(公告)日：2018-12-06

申请号：US15992140

申请日：2018-05-29

Applicant: MediaTek Inc.

Inventor： Chun-Chia Chen ,  Chih-Wei Hsu ,  Ching-Yeh Chen

IPC: H04N19/105 ,  H04N19/513 ,  H04N19/182

CPC classification number: H04N19/105 ,  H04N19/182 ,  H04N19/513 ,  H04N19/52 ,  H04N19/70

Abstract: A reduced merge candidate signaling method is provided. When building a merge candidate list for a prediction unit (PU) of a block of pixels, a video codec skips or partially skips the construction of some sub-PU merge candidates. The video codec then performs simplified pruning operations on the merge candidate list based on the skipped or partially constructed sub-PU merge candidates. The pruned candidate list is then used to select a merge candidate to encode or decode the block of pixels.

公开(公告)号：US20180184117A1

公开(公告)日：2018-06-28

申请号：US15848154

申请日：2017-12-20

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh Chen ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N19/577 ,  H04N19/513 ,  H04N19/176 ,  H04N19/109

Abstract: Method and apparatus of video coding using generalized bi-prediction are disclosed. According to one method, the generalized bi-prediction is extended for Decoder-Side Motion Vector Refinement (DMVR), where unequal weighting factor pair is allowed to form the template of the current block or the final predictor. In another method, the generalized bi-prediction is extended to pattern-based MV derivation (PMVD), where unequal weighting factor pair is allowed to combined reference blocks pointed by motion vectors derived based on PMVD. In yet another method, the generalized bi-prediction is used for Merge mode. When the final Merge MVP selected corresponds to bi-prediction using an unequal weighting factor pair, a new weighting factor pair is derived using neighboring reconstructed pixels of the current block and corresponding motion compensated pixels. In yet another method, the size of a set of weighting factor pairs is dependent on block size.

公开(公告)号：US09813730B2

公开(公告)日：2017-11-07

申请号：US14555901

申请日：2014-11-28

Applicant: MEDIATEK INC.

Inventor： Chih-Wei Hsu ,  Ching-Yeh Chen

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/583 ,  H04N19/567

CPC classification number: H04N19/583 ,  H04N19/567

Abstract: A method and apparatus for deriving fine-grained motion compensated prediction of boundary pixels in a video coding system are disclosed. Embodiments of the present invention determine one or more neighboring coding units (CUs) adjacent to a current coding unit (CU). For each neighboring CU, motion-compensated prediction is derived for each neighboring CU using the MV of the neighboring CU. The pre-generated predictors at a bottom side or a right side of each neighboring CUs are derived and stored on a smallest CU (SCU) basis. The pre-generated predictors and the motion compensated predictor for a current boundary pixel are combined using weighting factors to form a final predictor for the current pixel.

公开(公告)号：US20150163509A1

公开(公告)日：2015-06-11

申请号：US14555901

申请日：2014-11-28

Applicant: MEDIATEK INC.

Inventor： Chih-Wei Hsu ,  Ching-Yeh Chen

IPC: H04N19/513 ,  H04N19/52

CPC classification number: H04N19/583 ,  H04N19/567

Abstract: A method and apparatus for deriving fine-grained motion compensated prediction of boundary pixels in a video coding system are disclosed. Embodiments of the present invention determine one or more neighboring coding units (CUs) adjacent to a current coding unit (CU). For each neighboring CU, motion-compensated prediction is derived for each neighboring CU using the MV of the neighboring CU. The pre-generated predictors at a bottom side or a right side of each neighboring CUs are derived and stored on a smallest CU (SCU) basis. The pre-generated predictors and the motion compensated predictor for a current boundary pixel are combined using weighting factors to form a final predictor for the current pixel.

Abstract translation: 公开了一种用于导出视频编码系统中的边界像素的细粒度运动补偿预测的方法和装置。 本发明的实施例确定与当前编码单元（CU）相邻的一个或多个相邻编码单元（CU）。 对于每个相邻CU，使用相邻CU的MV为每个相邻CU导出运动补偿预测。 每个相邻CU的底部或右侧的预先生成的预测变量被导出并以最小的CU（SCU）存储。 使用加权因子来组合用于当前边界像素的预先生成的预测器和运动补偿预测器，以形成当前像素的最终预测器。

公开(公告)号：US08913656B2

公开(公告)日：2014-12-16

申请号：US13633162

申请日：2012-10-02

Applicant: Mediatek Inc.

Inventor： Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N7/26 ,  H04N19/86 ,  H04N19/423 ,  H04N19/82 ,  H04N7/12

CPC classification number: H04N19/117 ,  H04N19/129 ,  H04N19/176 ,  H04N19/423 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for in-loop processing of reconstructed video are disclosed. The reconstructed video data is partitioned into image units. The image unit corresponds to a Largest Coding Unit (LCU), a slice, or a tile. Horizontal deblocking is applied to the reconstructed video data across vertical image-unit boundaries and then vertical deblocking operates on n pixels of horizontal-deblocked video data on each side of horizontal image-unit boundaries. According to various embodiments of the present invention, the horizontal deblocking is applied to at least one of said n reconstructed lines to generate at least a horizontal-deblocked line for line pn−1. Sample adaptive offset (SAO) processing is then applied to at least a horizontal-deblocked line for line pn based on the horizontal-deblocked line for line pn−1. The above steps are performed before a neighboring image unit below the current image unit arrives.

Abstract translation: 公开了重建视频的环路处理方法和装置。 重建的视频数据被分割成图像单元。 图像单元对应于最大编码单元（LCU），切片或瓦片。 横向图像单位边界对重构的视频数据进行水平去块，然后垂直去块操作在水平图像单位边界两边的水平解块视频数据的n个像素上。 根据本发明的各种实施例，水平解块被施加到所述n个重构线中的至少一个，以生成用于线pn-1的至少一个水平解块线。 然后基于线pn-1的水平解块线将样本自适应偏移（SAO）处理应用于线pn的至少水平去块线。 上述步骤在当前图像单元下方的相邻图像单元到达之前执行。

公开(公告)号：US20130094568A1

公开(公告)日：2013-04-18

申请号：US13633162

申请日：2012-10-02

Applicant: MEDIATEK INC.

Inventor： Chih-Wei Hsu ,  Yu-Wen Huang

IPC: H04N7/26

CPC classification number: H04N19/117 ,  H04N19/129 ,  H04N19/176 ,  H04N19/423 ,  H04N19/82 ,  H04N19/86

Abstract: A method and apparatus for in-loop processing of reconstructed video are disclosed. The reconstructed video data is partitioned into image units. The image unit corresponds to a Largest Coding Unit (LCU), a slice, or a tile. Horizontal deblocking is applied to the reconstructed video data across vertical image-unit boundaries and then vertical deblocking operates on n pixels of horizontal-deblocked video data on each side of horizontal image-unit boundaries. According to various embodiments of the present invention, the horizontal deblocking is applied to at least one of said n reconstructed lines to generate at least a horizontal-deblocked line for line pn−1. Sample adaptive offset (SAO) processing is then applied to at least a horizontal-deblocked line for line pn based on the horizontal-deblocked line for line pn−1. The above steps are performed before a neighboring image unit below the current image unit arrives.

Abstract translation: 公开了重建视频的环路处理方法和装置。 重建的视频数据被分割成图像单元。 图像单元对应于最大编码单元（LCU），切片或瓦片。 横向图像单位边界对重建的视频数据进行水平去块，然后垂直去块操作在水平图像单位边界两边的水平解块视频数据的n个像素上。 根据本发明的各种实施例，水平解块被施加到所述n个重构线中的至少一个，以生成用于线pn-1的至少一个水平解块线。 然后基于线pn-1的水平解块线将样本自适应偏移（SAO）处理应用于线pn的至少水平去块线。 上述步骤在当前图像单元下方的相邻图像单元到达之前执行。